[Bug 1074454] [NEW] resize during insert problem

[gregrwm]

Public bug reported:

resize during insert seems to cause a problem.  to reproduce:
create a textfile using the 21 lines of text given below.
resize an xterm to 12 lines long and 80 characters wide.
in the xterm, edit (vim) the textfile.
position the cursor on the / preceeding "vmlinuz", and type
cB/
(with no escape)(still in insert mode)
resize the xterm to 10 lines by 80 characters.
vim is now in an inconsistent state.
the first visible cue is the disappearance of text following the cursor.
further inserted characters appear to insert on the wrong line.
as things progress it may recover itself, or it may ABRT or SEGV.
for example if at this point i
hit <Esc> (end the insert)
type :ls (with no CR)
enlarge the window
i get
Vim: Caught deadly signal SEGV
Vim: preserving files...
and it hangs thus.

<textfile>
   uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
   uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
   uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
   uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
   uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
   uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
   uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
   uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
   uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
   uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
   kernel    /SL-60-i386/Install-DVD/vmlinuz quiet panic=30 method=hd:sda7: ksdevice=
   initrd    /SL-60-i386/Install-DVD/initrd.img
   initrd    /SL-60-i386/Install-DVD/initrd.img
   initrd    /SL-60-i386/Install-DVD/initrd.img
   initrd    /SL-60-i386/Install-DVD/initrd.img
   initrd    /SL-60-i386/Install-DVD/initrd.img
   initrd    /SL-60-i386/Install-DVD/initrd.img
   initrd    /SL-60-i386/Install-DVD/initrd.img
   initrd    /SL-60-i386/Install-DVD/initrd.img
   initrd    /SL-60-i386/Install-DVD/initrd.img
   initrd    /SL-60-i386/Install-DVD/initrd.img
</textfile>

$  lsb_release -rd
Description:    Ubuntu 12.10
Release:        12.10
$  apt-cache policy vim
vim:
  Installed: 2:7.3.547-4ubuntu1
  Candidate: 2:7.3.547-4ubuntu1
  Version table:
 *** 2:7.3.547-4ubuntu1 0
        500 http://ie.archive.ubuntu.com/ubuntu/ quantal/main i386 Packages
        100 /var/lib/dpkg/status

** Affects: vim (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1074454

Title:
  resize during insert problem

Status in “vim” package in Ubuntu:
  New

Bug description:
  resize during insert seems to cause a problem.  to reproduce:
  create a textfile using the 21 lines of text given below.
  resize an xterm to 12 lines long and 80 characters wide.
  in the xterm, edit (vim) the textfile.
  position the cursor on the / preceeding "vmlinuz", and type
  cB/
  (with no escape)(still in insert mode)
  resize the xterm to 10 lines by 80 characters.
  vim is now in an inconsistent state.
  the first visible cue is the disappearance of text following the cursor.
  further inserted characters appear to insert on the wrong line.
  as things progress it may recover itself, or it may ABRT or SEGV.
  for example if at this point i
  hit <Esc> (end the insert)
  type :ls (with no CR)
  enlarge the window
  i get
  Vim: Caught deadly signal SEGV
  Vim: preserving files...
  and it hangs thus.

  <textfile>
     uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
     uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
     uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
     uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
     uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
     uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
     uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
     uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
     uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
     uuid                                          960c92bd-69d3-415f-93b6-2242187e3557
     kernel    /SL-60-i386/Install-DVD/vmlinuz quiet panic=30 method=hd:sda7: ksdevice=
     initrd    /SL-60-i386/Install-DVD/initrd.img
     initrd    /SL-60-i386/Install-DVD/initrd.img
     initrd    /SL-60-i386/Install-DVD/initrd.img
     initrd    /SL-60-i386/Install-DVD/initrd.img
     initrd    /SL-60-i386/Install-DVD/initrd.img
     initrd    /SL-60-i386/Install-DVD/initrd.img
     initrd    /SL-60-i386/Install-DVD/initrd.img
     initrd    /SL-60-i386/Install-DVD/initrd.img
     initrd    /SL-60-i386/Install-DVD/initrd.img
     initrd    /SL-60-i386/Install-DVD/initrd.img
  </textfile>

  $  lsb_release -rd
  Description:    Ubuntu 12.10
  Release:        12.10
  $  apt-cache policy vim
  vim:
    Installed: 2:7.3.547-4ubuntu1
    Candidate: 2:7.3.547-4ubuntu1
    Version table:
   *** 2:7.3.547-4ubuntu1 0
          500 http://ie.archive.ubuntu.com/ubuntu/ quantal/main i386 Packages
          100 /var/lib/dpkg/status

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